High-volume production of laser-polarized Xe-129
High-volume production of laser-polarized Xe-129
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DOI：
10.1063/1.117022
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发表时间：
1996-09-16
影响因子：
4
通讯作者：
Happer, W
中科院分区：
文献类型：
--
作者：
Driehuys, B;Cates, GD;Happer, W
描述了一种通过与光泵Rb蒸汽的自旋交换产生几升核自旋极化的Rb-129气体的方法。我们使用140 W的AlGaAs激光二极管阵列，其宽光谱输出被有效地吸收，通过采用类似于10大气压的He-4来压力加宽Rb D1吸收轮廓。在连续的气流中极化，然后低温积累和储存。这种技术的扩展应该能够生产数十升的具有50%数量级的核自旋极化的α-129。以升为单位生产激光极化的129对于使用自旋极化的129的磁共振成像的持续发展是重要的。(C)1996年美国物理研究所。
A method is described for producing several liters of nuclear spin polarized Xe-129 gas via spin exchange with an optically pumped Rb vapor. We use a 140 W AlGaAs laser diode array whose broad spectral output is efficiently absorbed by employing similar to 10 atm of He-4 to pressure broaden the Rb D1 absorption profile. Xe-129 is polarized in a continuous gas flow and is then cryogenically accumulated and stored. Extensions of this technique should enable the production of tens of liters of Xe-129 with a nuclear spin polarization of order 50%. Production of laser-polarized Xe-129 in liter quantities is important for the continued development of magnetic resonance imaging using spin-polarized Xe-129. (C) 1996 American Institute of Physics.